OSV-2020-701 Heap-use-after-free in read_chunks_before_idat
A heap-use-after-free in the spng library allows attackers to cause crashes or potentially execute code via malicious PNG files.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is OSV-2020-701?
OSV-2020-701 is an use after free vulnerability in libspng, published on 1 Jul 2020. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=16266
Crash type: Heap-use-after-free READ {*}
Crash state:
read_chunks_before_idat
get_ancillary
spng_decoded_image_size
Which versions are affected by OSV-2020-701?
1 open source package ship an affected version, including libspng.
| Package | Affected | Fixed in |
|---|---|---|
libspng OSS-Fuzz | All versions | None |
How do I fix OSV-2020-701?
No fix has been published for OSV-2020-701 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is OSV-2020-701 being exploited?
There is no known exploitation of OSV-2020-701 in the wild and no public exploit code.